<button class="button">Button</button>

<style>
/* From Uiverse.io by vinodjangid07  - Tags: animation, gradient, button, hover, hover effect */
.button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100px;
  height: 40px;
  font-size: 15px;
  font-weight: 600;
  color: white;
  border: none;
  background-size: 200% 200%;
  background-color: #99fff7;
  background-image: radial-gradient(
      at 65% 89%,
      hsla(249, 100%, 62%, 1) 0px,
      transparent 50%
    ),
    radial-gradient(at 68% 76%, hsla(334, 100%, 74%, 1) 0px, transparent 50%),
    radial-gradient(at 52% 39%, hsla(34, 100%, 71%, 1) 0px, transparent 50%),
    radial-gradient(at 12% 37%, hsla(282, 100%, 66%, 1) 0px, transparent 50%),
    radial-gradient(at 34% 9%, hsla(201, 100%, 63%, 1) 0px, transparent 50%),
    radial-gradient(at 89% 18%, hsla(193, 100%, 74%, 1) 0px, transparent 50%),
    radial-gradient(at 36% 37%, hsla(251, 100%, 65%, 1) 0px, transparent 50%);
  background-position: left;
  cursor: pointer;
  border-radius: 10px;
  transition: all 3s;
}

.button:hover {
  background-position: right;
}

</style>
    